nix-configs

commit b7c43b1f0748839946ab1c80f65ff205ff5e9ebd
parent 37734a537eacb06ff14517a2e7d6d610046c433a
Author: breadcat <breadcat@users.noreply.github.com>
Date:   Mon, 26 Jan 2026 16:00:25 +0000

Preliminary scanner support

Diffstat:
A
common/scanning.nix
 | 
6
++++++
M
machines/atlas.nix
 | 
1
+
A
scripts/scan-to-pdf.nix
 | 
72
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

3 files changed, 79 insertions(+), 0 deletions(-)
diff --git a/common/scanning.nix b/common/scanning.nix
@@ -0,0 +1,6 @@
+{ username, ... }:
+
+{
+  hardware.sane.enable = true;
+  users.users."${username}".extraGroups = [ "scanner" ];
+}
diff --git a/machines/atlas.nix b/machines/atlas.nix
@@ -22,6 +22,7 @@ let machine = "atlas"; in {
     ../common/nur.nix
     ../common/packages-unfree.nix
     ../common/packages.nix
+    ../common/scanning.nix
     ../common/ssh.nix
     ../common/steam.nix
     ../common/syncthing.nix
diff --git a/scripts/scan-to-pdf.nix b/scripts/scan-to-pdf.nix
@@ -0,0 +1,72 @@
+{ pkgs, ... }:
+
+{
+  environment.systemPackages = [
+    (pkgs.writeShellScriptBin "scan-to-pdf" ''
+		set -e
+
+		# Default values
+		MODE="Gray"
+		SOURCE="ADF Front"
+
+		# Parse arguments in any order
+		for arg in "$@"; do
+		  case "$arg" in
+			color)
+			  MODE="Color"
+			  ;;
+			duplex)
+			  SOURCE="ADF Duplex"
+			  ;;
+			*)
+			  echo "Unknown argument: $arg"
+			  echo "Usage: scan-to-pdf [color] [duplex]"
+			  exit 1
+			  ;;
+		  esac
+		done
+
+		# Display scanning mode
+		if [ "$MODE" = "Color" ]; then
+		  echo "Scanning in color mode"
+		else
+		  echo "Scanning in greyscale, add 'color' argument to scan in full color"
+		fi
+
+		if [ "$SOURCE" = "ADF Duplex" ]; then
+		  echo "Scanning both sides (duplex mode)"
+		else
+		  echo "Scanning single-sided, add 'duplex' argument to scan both sides"
+		fi
+
+		OUTPUT="output-$(date +%Y%m%d-%H%M%S).pdf"
+		TMPDIR=$(mktemp -d)
+
+		cleanup() {
+		  rm -rf "$TMPDIR"
+		}
+		trap cleanup EXIT
+
+		echo "Scanning pages..."
+		if ! ${pkgs.sane-backends}/bin/scanimage --format=tiff --resolution 300 --mode "$MODE" \
+		  --batch="$TMPDIR/page%d.tiff" --source "$SOURCE"; then
+		  echo "Error: Scanning failed. Is there paper in the ADF?"
+		  exit 1
+		fi
+
+		if ! ls "$TMPDIR"/*.tiff 1> /dev/null 2>&1; then
+		  echo "Error: No pages were scanned."
+		  exit 1
+		fi
+
+		echo "Converting to PDF..."
+		${pkgs.imagemagick}/bin/magick "$TMPDIR"/*.tiff "$TMPDIR/combined.pdf"
+
+		echo "Running OCR..."
+		${pkgs.ocrmypdf}/bin/ocrmypdf --deskew --rotate-pages --rotate-pages-threshold 0.5 \
+		  --optimize 1 "$TMPDIR/combined.pdf" "$OUTPUT"
+
+		echo "Done! Output saved to: $OUTPUT"
+    '')
+  ];
+}